Is it possible to organize a backup DHCP server on the same network using the same config?

Question

linux

There is a network with a DHCP server based on dhcpd from the CentOS 7 box. Is it possible to organize in parallel the same DHCP server that will serve the same network during the temporary shutdown of the main server?
Is there a kit out of the box to organize such a redundant server and tighten the configuration of another DHCP server? (so as not to write a monitor daemon as a crutch).
This is in case the client is so dumb (like mobile devices) that it constantly polls DHCP every time it connects, even if it already has cached IP settings.

Answer 1

There are two options - set up failover on isc dhcp - https://habrahabr.ru/post/323984/
Install kea dhcp and set up a common database of releases on postgres/mysql - then no failover is needed, two servers will respond at once, but will only confirm one. A full failover is expected in version 1.4
https://www.isc.org/blogs/kea-with-mysql-cluster-b...